如何在 Mongo 标准查询（Spring Boot）中使用“$dateToString”答案

【问题标题】：How to use "$dateToString" in Mongo criteriaQuery (Spring Boot)如何在 Mongo 标准查询（Spring Boot）中使用“$dateToString”
【发布时间】：2018-05-28 12:42:11
【问题描述】：

我使用 SpringBoot(v1.5.10)、SpringData 和 MongoDb；

db.login.aggregate(
[
    { 
        "$match" : {
            "user._id" : NumberLong(204)
        }
    }, 
    { 
        "$group" : {
            "_id" : {
               "datetime" : { $dateToString: { format: "%d-%m-%Y", date: "$datetime"}}, 
                "ip" : "$ip",


            },
             count: { $sum: 1 }   
        }
    }

]);

2011-01-10 算5

2011-01-16 计数 16

    Criteria criteria = Criteria.where("user._id").is(paramuserid).andOperator(
        Criteria.where("datetime").gte(paramfirstdate),
        Criteria.where("datetime").lt(paramseconddate)
                );
AggregationOperation match = Aggregation.match(criteria);   

List<AggregationOperation> aggregationoperations = new ArrayList <AggregationOperation>();  
aggregationoperations.add(match);
aggregationoperations.add(Aggregation.group("datetime"));  
AggregationResults<?> aggregationresults = this.mngT.aggregate(Aggregation.newAggregation(aggregationoperations), Login.class, Object.class);

2011-01-10 09:00:01 计数 1
2011-01-10 09:15:00 计数 1

Mongo 没有“时间”的聚合组日期时间，我尝试类似的条件查询不起作用，因为组与时间部分。如何在条件查询中使用“$dateToString”

【问题讨论】：

标签： spring mongodb spring-boot aggregation-framework criteria

【解决方案1】：

我解决了。

Criteria criteria = Criteria.where("user._id").is(paramuserid).andOperator(
            Criteria.where("datetime").gte(paramfirstdate),
            Criteria.where("datetime").lt(paramseconddate)
                    );
    AggregationOperation match = Aggregation.match(criteria);   

    List<AggregationOperation> aggregationoperations = new ArrayList <AggregationOperation>();  
    aggregationoperations.add(match);
    aggregationoperations.add(Aggregation.project("ip","datetime").andExpression("datetime").dateAsFormattedString("%d-%m-%Y").as("formateddate"));
    aggregationoperations.add(Aggregation.group("ip","formateddate").count().as("TOT"));
    AggregationResults<?> aggregationresults = this.mngT.aggregate(Aggregation.newAggregation(aggregationoperations), Login.class, Object.class);

【讨论】：